η′ → π0γγ and ��′ → ηγγ: a primer analysis
The electromagnetic rare decays η′ → π0γγ and η′ → π0γγ are analysed for the first time and their predicted branching ratios given. The vector meson exchange dominant contribution is treated using Vector Meson Dominance and the scalar component is estimated by means of the Linear Sigma Model. The ag...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2012-12-01
|
| Series: | EPJ Web of Conferences |
| Online Access: | http://dx.doi.org/10.1051/epjconf/20123703002 |
| _version_ | 1818778780678750208 |
|---|---|
| author | Escribano Rafel |
| author_facet | Escribano Rafel |
| author_sort | Escribano Rafel |
| collection | DOAJ |
| description | The electromagnetic rare decays η′ → π0γγ and η′ → π0γγ are analysed for the first time and their predicted branching ratios given. The vector meson exchange dominant contribution is treated using Vector Meson Dominance and the scalar component is estimated by means of the Linear Sigma Model. The agreement between our calculation and the measurement of the related process η → π0γγ is a check of the procedure. Scalar meson effects are seen to be irrelevant for η′ → π0γγ, while a significant scalar contribution due to the σ(500) resonance seems to emerge in the case of η′ → π0γγ. Future measurements coming from KLOE-2, Crystal Ball, WASA, and BES-III will elucidate if any of these processes carry an important scalar contribution or they are simply driven by the exchange of vector mesons. |
| first_indexed | 2024-12-18T11:50:10Z |
| format | Article |
| id | doaj.art-f4bb4d4c2ab4489d89c6f63f8380ba6f |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-18T11:50:10Z |
| publishDate | 2012-12-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-f4bb4d4c2ab4489d89c6f63f8380ba6f2022-12-21T21:09:11ZengEDP SciencesEPJ Web of Conferences2100-014X2012-12-01370300210.1051/epjconf/20123703002η′ → π0γγ and ��′ → ηγγ: a primer analysisEscribano RafelThe electromagnetic rare decays η′ → π0γγ and η′ → π0γγ are analysed for the first time and their predicted branching ratios given. The vector meson exchange dominant contribution is treated using Vector Meson Dominance and the scalar component is estimated by means of the Linear Sigma Model. The agreement between our calculation and the measurement of the related process η → π0γγ is a check of the procedure. Scalar meson effects are seen to be irrelevant for η′ → π0γγ, while a significant scalar contribution due to the σ(500) resonance seems to emerge in the case of η′ → π0γγ. Future measurements coming from KLOE-2, Crystal Ball, WASA, and BES-III will elucidate if any of these processes carry an important scalar contribution or they are simply driven by the exchange of vector mesons.http://dx.doi.org/10.1051/epjconf/20123703002 |
| spellingShingle | Escribano Rafel η′ → π0γγ and ��′ → ηγγ: a primer analysis EPJ Web of Conferences |
| title | η′ → π0γγ and ��′ → ηγγ: a primer analysis |
| title_full | η′ → π0γγ and ��′ → ηγγ: a primer analysis |
| title_fullStr | η′ → π0γγ and ��′ → ηγγ: a primer analysis |
| title_full_unstemmed | η′ → π0γγ and ��′ → ηγγ: a primer analysis |
| title_short | η′ → π0γγ and ��′ → ηγγ: a primer analysis |
| title_sort | η π0γγ and �� ηγγ a primer analysis |
| url | http://dx.doi.org/10.1051/epjconf/20123703002 |
| work_keys_str_mv | AT escribanorafel ēp0ngandēngaprimeranalysis |